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LM3697YFQR Fiches technique(PDF) 1 Page - Texas Instruments |
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LM3697YFQR Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 36 page IN SW HVLED1 PGND HWEN SDA SCL COUT CIN L D1 PWM OVP VIN = 2.7V to 5.5V VOUT up to 40V VIN HVLED3 HVLED2 LM3697 www.ti.com SNOSCS2A – NOVEMBER 2013 – REVISED DECEMBER 2013 High-Efficiency Three-String White LED Driver Check for Samples: LM3697 1 FEATURES DESCRIPTION The LM3697 is a high-efficiency three string power • Drives Three Parallel High-Voltage LED Strings source for backlight or keypad LEDs in smart-phone for Display and Keypad Lighting handsets. The high-voltage inductive boost converter • High-Voltage Strings Capable of up to 40V provides the power for three series LED strings for Output Voltage and up to 90% Efficiency display backlight and keypad functions (HVLED1, HVLED2 and HVLED3). • Up to 30 mA per Current Sink • 11-Bit Configurable Dimming Resolution An additional feature is a Pulse Width Modulation (PWM) control input for content adjustable backlight • PWM Input for Content Adjustable Brightness control, which can be used to control any high- Control (CABC) voltage current sink. • Fully Configurable LED Grouping and Control The LM3697 is fully configurable via an I2C- • Four Configurable Over-Voltage Protection compatible interface. The device is available in a 12- Thresholds (16V, 24V, 32V, and 40V) bump (1.26 mm ± 30 µm x 1.61 mm ± 30 µm x 0.6 • Selectable 500 kHz and 1MHz Switching mm ± 75 um) DSBGA and operates over a 2.7V to Frequency 5.5V input voltage range and a −40°C to +85°C temperature range. • 30 mm2 Total Solution Size APPLICATIONS • Power Source for Smart Phone Illumination • Display, Keypad and Indicator Illumination Typical Application Circuit 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2013, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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